<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Viewport说明</title>
  <meta name="viewport" content="
  width=device-width, 
  initial-scale=1.0, 
  maximum-scale=1.0, 
  user-scalable=0, 
  shrink-to-fit=no, 
  viewport-fit=cover">
</head>
<body>
  
</body>
</html>